Thermal detector



FIG. 1 is a top plan of a thermal detector showing my new design;

FIG. 2 is a side elevational view taken from the bottom of FIG. 1;

FIG. 3 is a side elevational view taken from the right of FIG. 1;

FIG. 4 is a side elevational view taken from the left of FIG. 1;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is an enlarged sectional view taken in the direction of the arrows along line 6--6 of FIG. 1;

FIG. 7 is a top plan view of a second embodiment of FIG. 1, the only difference being the omission of the circular ribs seen in the center of FIG. 1;

FIG. 8 is an enlarged sectional view taken in the direction of the arrows along line 8--8 in FIG. 7;

FIG. 9 is a top plan view of a third embodiment of FIG. 1, the only difference being the addition of cross ribs underneath the existing circular ribs seen in the center of FIG. 1;

FIG. 10 is an enlarged sectional view taken in the direction of the arrows along line 10--10 in FIG. 9. 

The ornamental design for a thermal detector, as shown and described. 